Agrrawal, Pankaj; Skaves, Matthew (31 August 2015). "Seasonality in Stock and Bond ETFs (2001—2014): The Months Are Getting Mixed Up but Santa Delivers on Time". The Journal of Investing. 24 (3): 129–143. doi:10.3905/joi.2015.24.3.129. S2CID155997185.
Agrrawal, Pankaj; Skaves, Matthew (31 August 2015). "Seasonality in Stock and Bond ETFs (2001—2014): The Months Are Getting Mixed Up but Santa Delivers on Time". The Journal of Investing. 24 (3): 129–143. doi:10.3905/joi.2015.24.3.129. S2CID155997185.